Datis



represented. j respond wit groove adapt over thejend of einem: HENRY Gr.DAVIS, phythe city, county, `and ave invented a certain Splint; and I dohereby owing is a full and exhe same, which I have to the obtaining ofnts splintV complete,

"d to the elastic` partsp `2, Ll, `and 5, repre- Skilled the art toention I will proceed to meteroutside must be less diameter of Aso thatit may rtion` is threaded to corund" the" exterior ofthe tube y` beornamented in any di adapted to be easily the `flngersor by any ofAnearl its lower end I roove D and into this e `of met-al Ev-adapted ton. The part C is fitted fter E is inserted in the 9C `and E areperforated i Inthe exteri turn a shallo slide around tas.representedfto"receive a screw F. The j "latter secures"` the partstogether, so that by j reasonofthefpieceE being unable to escape gnatelike `partsin all `of metal of the` form' j thread on the redB. The-"remainder plainon` its interior and adapted N UN e, j EDsT TEs PATENToEEIoE.

' ExTENsIoN-SPLINT.

"marien of Letters Patent No. 35,303, dated May 2o, 1862.

from the groove D, and the screw F` enter- Y ing into the hole in thepiece E the nut C is unable to escape from or to slide lengthwise on Abut isfree to turn around it to any extent desired. Turning the nut C inone direction causes the splint to increase its length by thrusting thepart- B out from A, while turning in the opposite direction draws Bfurther into A and diminishes the `length `of the splint. The nut may beturned as little as is desired and allows a very delicate adjustmentwhile it also is able without additional device to retain the parts forany periodin a given position.

My splint is cheaper, lighter, 'and capable `of more delicate adjustmentof the length than any before lmown to me.

I invented and gave freely to the profession some years since the .useof elastic extension .with several different forms of splints for itsapplication and withl which the splint here rep'- resented is intendedto be used, but although that system of treating theaifection designatedis now familiar to the profession the splints have always beenenculnbered i 1 with rack and pinion and with a pawl or its equivalentfor retaining the parts in position.

The importance of simplicity in the construction, and especially oflightness, in ap- 1 `paratus of this kind, is readily apparent. Theperfect facility with which my splint `may be extended to any requiredsmall eX- tent as compared with the previous devices is also verymarked, and the absence of entangling projecting portions, and thealmost entire immunity from liability to derangement, constitute furtherveryV important advantages due to the peculiarity of my invention. Myinvention is also better adapted to be produced very cheaply by machinesthan any of the previously known construe` tions.

Having now fully described my invention "what I claim as new therein anddesire to secure by Letters Patent is- The within described splintcomposed of the tube A, threaded part B and nut or equivalent C, as anew article` of surgical apparatus, the same being adapted to operate inthe manner and so as to realize the advantages herein set forth.

Witnesses:

e WM. I-I. DrcKINsoN,

WM. J. CRUMM.

HENRY GeDAvIs, j

